CN210640034U

CN210640034U - Halogen-free low-smoke flame-retardant control cable with high shielding performance

Info

Publication number: CN210640034U
Application number: CN201921766729.4U
Authority: CN
Inventors: 张勇豪; 孟益标; 李金堂; 岳亚博; 梁增显; 吴丹阳; 黄金坊
Original assignee: Zhejiang Wanma Co Ltd
Current assignee: Zhejiang Wanma Co Ltd
Priority date: 2019-10-21
Filing date: 2019-10-21
Publication date: 2020-05-29
Anticipated expiration: 2029-10-21

Abstract

The utility model discloses a halogen-free low-smoke flame-retardant high-shielding-performance control cable, which comprises a plurality of conductors, wherein each conductor is externally wrapped with an insulating layer, the whole outsourcing of the plurality of conductors is provided with a cabling belting, the cabling belting is a halogen-free low-smoke high-flame-retardant belt, the outsourcing of the cabling belting is provided with a shielding layer, the shielding layer is externally wrapped with an inner sheath, and the outer sheath of the inner sheath is provided with an outer sheath; the shielding layer comprises a copper strip shielding layer and a cobalt-based alloy belt, the cobalt-based alloy belt is wrapped outside the copper strip shielding layer, a plurality of bare copper wires are arranged between the copper strip shielding layer and the cabling belt, and a plurality of alloy wires are arranged between the copper strip shielding layer and the cobalt-based alloy belt. The structural design of the halogen-free low-smoke flame-retardant high-shielding-performance control cable can ensure that the cable has the advantages of halogen-free low-smoke flame retardance, electromagnetic interference resistance and high shielding performance.

Description

Halogen-free low-smoke flame-retardant control cable with high shielding performance

Technical Field

The utility model relates to a cable especially indicates a there is not steamed low fire-retardant high shielding property control cable of cigarette.

Background

The control cable is used as a connecting line among various electrical appliances, instruments and automatic devices, is used for occasions such as controlling and monitoring interlocking loops, self-protection lines and the like, plays various roles of transmitting various signals, starting operation control, alarming, measuring and the like, and is widely applied to departments and fields such as industrial and mining enterprises, transportation, science and technology, national defense and the like. For a control cable with high shielding performance, reducing the interference caused by the outside is an important performance requirement. Shielding performance in cables relies primarily on metallic shielding to attenuate and prevent electrical interference. The quality of the shielding performance is related to whether the control cable and the control system connected with the control cable can meet the use requirement. However, when the control cable is applied to a region with dense crowds, the control cable is required to have flame retardant, non-toxic and low smoke performances, most people are killed by inhaling toxic gas when a fire accident happens, and smoke generated on a fire scene can be reduced when the control cable has the halogen-free low smoke flame retardant performance, so that a good visual field is provided for rescue workers, and help is provided for rescue actions.

At present there is not steamed low fire-retardant control cable of cigarette mostly adopts the copper conductor, and insulating polyvinyl chloride or crosslinked polyethylene that adopts normally transposition, the cabling also can set up the shielding layer in order to improve the ability that the cable prevented internal and external interference simultaneously, can set up the total shielding after the cabling, then just be crowded package halogen-free low fire-retardant oversheath of cigarette. And other protection structures are added to some control cables due to different use occasions, for example, when the control cables need to bear certain mechanical external force, an inner protection layer is wrapped or extruded after cabling, steel tape armoring or steel wire armoring is carried out, and then the halogen-free low-smoke flame-retardant outer sheath is extruded.

The shielding structure of the conventional control cable mainly adopts copper strip wrapped shielding, copper wire braided shielding and wrapped copper strip shielding. Such shielding effect may not necessarily meet the requirements of some customers on shielding performance; the method for increasing the shielding performance effect is usually realized by increasing the shielding thickness, the traditional control cable shielding is mostly woven by copper wires, when the diameter of the woven monofilament is increased (the shielding thickness is increased), a plurality of problems are caused on the production process or equipment conditions, and the method is not suitable when customers require high shielding performance and cable outer diameter. When the control cable is required to have halogen-free low-smoke flame-retardant high shielding performance, the copper strip is adopted for wrapping shielding, the copper wire braided shielding and the wrapping copper strip shielding, and the outer sheath is made of the halogen-free low-smoke flame-retardant sheath material, so that the flame-retardant performance requirement cannot be met.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming the shortcoming among the prior art, provide a there is not steamed low fire-retardant high shielding property control cable of cigarette.

The utility model aims at realizing through the following technical scheme:

a halogen-free low-smoke flame-retardant high-shielding-performance control cable comprises a plurality of conductors, wherein an insulating layer is wrapped outside each conductor, a plurality of conductors are integrally wrapped with a cabling wrapping tape, the cabling wrapping tape is a halogen-free low-smoke high-flame-retardant tape, a shielding layer is wrapped outside the cabling wrapping tape, an inner sheath is wrapped outside the shielding layer, and an outer sheath is wrapped outside the inner sheath; the shielding layer comprises a copper strip shielding layer and a cobalt-based alloy belt, the cobalt-based alloy belt is wrapped outside the copper strip shielding layer, a plurality of bare copper wires are arranged between the copper strip shielding layer and the cabling belt, and a plurality of alloy wires are arranged between the copper strip shielding layer and the cobalt-based alloy belt. The structure of the multilayer shielding layer formed by adopting various materials can ensure that the cable has anti-electromagnetic interference and high shielding performance; the halogen-free low-smoke high-flame-retardant belt plays a flame-retardant role; the bare copper wire and the alloy wire can ensure the electrical conduction.

As a preferred scheme, the inner sheath is a halogen-free low-smoke flame-retardant polyolefin inner sheath. The halogen-free low-smoke flame-retardant polyolefin inner sheath meets the flame-retardant performance requirement.

As a preferred scheme, the outer sheath is a high-oxygen-index halogen-free low-smoke flame-retardant sheath material. The high-oxygen index halogen-free low-smoke flame-retardant sheath material meets the flame-retardant performance requirement, and does not generate toxic gas and excessive smoke under the condition of ignition.

As a preferable scheme, the armor is arranged outside the inner sheath, and the glass fiber tape is wound outside the armor. The glass fiber band can play a role in insulating temperature and resisting flame.

Preferably, the conductor is a type 2 conductor structure with a proper stranding pitch.

As a preferred scheme, a halogen-free low-smoke high-flame-retardant belt is wrapped outside the copper strip shielding layer, and a halogen-free low-smoke high-flame-retardant belt is wrapped outside the cobalt-based alloy belt. The method is characterized in that a halogen-free low-smoke high-flame-retardant belt with a proper thickness is selected to eliminate local 'protrusion' caused by longitudinally placed bare copper wires and alloy wires.

Preferably, the diameter of the bare copper wire is greater than or equal to 0.4mm, and the diameter of the alloy wire is greater than or equal to 0.4 mm.

As a preferable scheme, the insulating layer is a crosslinked polyethylene insulating material. The crosslinked polyethylene has excellent electrical properties and good mechanical and physical properties, so that the thickness of the insulation layer extruded outside the conductor is smaller, thereby reducing the outer diameter of the cable.

The beneficial effects of the utility model are that, there is not steamed low fire-retardant high shielding property control cable's structural design can ensure that the cable does not have steamed low fire-retardant electromagnetic interference and the high shielding property of having of cigarette simultaneously. Just the utility model discloses simple structure, easily realization.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Wherein: 1. the cable comprises a conductor, 2, an insulating layer, 3, a halogen-free low-smoke high-flame-retardant belt, 4, a bare copper wire, 5, a copper strip shielding layer, 6, an alloy wire, 7, a cobalt-based alloy belt, 8, a halogen-free low-smoke flame-retardant polyolefin inner sheath, 9, armor, 10, a glass fiber belt and 11, and a high-oxygen index halogen-free low-smoke flame-retardant polyolefin sheath.

Detailed Description

The invention is further described below with reference to the drawings and examples.

Example (b): a halogen-free low-smoke flame-retardant high-shielding-performance control cable comprises 7 conductors 1, wherein an insulating layer 2 is wrapped outside each conductor, a cabling wrapping tape is wrapped outside the conductor integrally and is a halogen-free low-smoke high-flame-retardant tape 3, a shielding layer is wrapped outside the cabling wrapping tape, an inner sheath is wrapped outside the shielding layer, and an outer sheath is wrapped outside the inner sheath; the shielding layer comprises a copper strip shielding layer 5 and a cobalt-based alloy belt 7, the cobalt-based alloy belt wraps the copper strip shielding layer, 2 bare copper wires 4 are arranged between the copper strip shielding layer and the cabling belt, and 2 alloy wires 6 are arranged between the copper strip shielding layer and the cobalt-based alloy belt. The inner sheath is a halogen-free low-smoke flame-retardant polyolefin inner sheath 8. The outer sheath is a high-oxygen index halogen-free low-smoke flame-retardant sheath material 11. An armor 9 is arranged outside the inner sheath, and a glass fiber tape 10 is wound outside the armor. The conductor is a type 2 conductor structure with a proper stranding pitch. The copper strip shielding layer outsourcing be equipped with the high fire-retardant area of steamed low cigarette, cobalt-based alloy area outsourcing be equipped with the high fire-retardant area of steamed low cigarette. The diameter of the bare copper wire is more than or equal to 0.4mm, and the diameter of the alloy wire is more than or equal to 0.4 mm. The insulating layer is made of crosslinked polyethylene insulating material.

The structure of the multilayer shielding layer formed by adopting various materials can ensure that the cable has anti-electromagnetic interference and high shielding performance; the halogen-free low-smoke high-flame-retardant belt plays a flame-retardant role; the bare copper wire and the alloy wire can ensure the electrical conduction. The halogen-free low-smoke flame-retardant polyolefin inner sheath meets the flame-retardant performance requirement. The high-oxygen index halogen-free low-smoke flame-retardant sheath material meets the flame-retardant performance requirement, and does not generate toxic gas and excessive smoke under the condition of ignition. The glass fiber band can play a role in insulating temperature and resisting flame. The method is characterized in that a halogen-free low-smoke high-flame-retardant belt with a proper thickness is selected to eliminate local 'protrusion' caused by longitudinally placed bare copper wires and alloy wires. The crosslinked polyethylene has excellent electrical properties and good mechanical and physical properties, so that the thickness of the insulation layer extruded outside the conductor is smaller, thereby reducing the outer diameter of the cable.

The above-described embodiments are only preferred embodiments of the present invention, and are not intended to limit the present invention in any way, and other variations and modifications may be made without departing from the scope of the claims.

Claims

1. A halogen-free low-smoke flame-retardant high-shielding-performance control cable is characterized by comprising a plurality of conductors, wherein an insulating layer is wrapped outside each conductor, a plurality of conductors are integrally wrapped with a cabling wrapping tape, the cabling wrapping tape is a halogen-free low-smoke high-flame-retardant tape, a shielding layer is wrapped outside the cabling wrapping tape, an inner sheath is wrapped outside the shielding layer, and an outer sheath is wrapped outside the inner sheath; the shielding layer comprises a copper strip shielding layer and a cobalt-based alloy belt, the cobalt-based alloy belt is wrapped outside the copper strip shielding layer, a plurality of bare copper wires are arranged between the copper strip shielding layer and the cabling belt, and a plurality of alloy wires are arranged between the copper strip shielding layer and the cobalt-based alloy belt.

2. The control cable of claim 1, wherein the inner sheath is a halogen-free low-smoke flame-retardant polyolefin inner sheath.

3. The halogen-free low-smoke flame-retardant high-shielding-performance control cable according to claim 1, wherein the outer sheath is a high-oxygen-index halogen-free low-smoke flame-retardant sheath material.

4. The halogen-free low-smoke flame-retardant high-shielding-performance control cable according to claim 2 or 3, characterized in that an armor is arranged outside the inner sheath, and a glass fiber tape is wrapped outside the armor.

5. The halogen-free low-smoke flame-retardant high-shielding-performance control cable according to claim 1, wherein the conductor is a type 2 conductor structure with a proper stranding pitch.

6. The halogen-free low-smoke flame-retardant high-shielding-performance control cable according to claim 1, wherein a halogen-free low-smoke high-flame-retardant belt is wrapped outside the copper strip shielding layer, and a halogen-free low-smoke high-flame-retardant belt is wrapped outside the cobalt-based alloy belt.

7. The halogen-free low-smoke flame-retardant high-shielding-performance control cable according to claim 1, wherein the diameter of the bare copper wire is greater than or equal to 0.4mm, and the diameter of the alloy wire is greater than or equal to 0.4 mm.

8. The halogen-free low-smoke flame-retardant high-shielding-performance control cable according to claim 1, wherein the insulating layer is a crosslinked polyethylene insulating material.